-3db 66hz-21200khz. 12"X8"X7" 15lbs each. GNP was a high end speaker manufacturer out of Pasadena, CA. They made speakers up until the mid 2000's. These model 10's used totl Peerless/Seas 6.5" drivers and a totl 1" Vifa Silk dome tweeters. They are an acoustic suspension design. Near perfect midrange. They have a tweeter level knob on the back that is done with class/quality and gives you many options to tailor the highs to your liking. You will know what I mean by class/quality when you hold one of these speakers in your hands. They are like cinder blocks. Very heavy 0 resonance cabinets. Real.Walnut veneer. I own speakers up to $5k and listened to these for the last 2weeks in my main rig and was very pleased and pleasantly surprised. They are a high end performer at a budget price. They best my Dynaudio Emit 10's and many other speakers I've heard that cost much more. Any questions feel free to ask.